package com.wang.nowcoder.controller.interceptor;

import com.wang.nowcoder.pojo.LoginTicket;
import com.wang.nowcoder.pojo.User;
import com.wang.nowcoder.service.UserService;
import com.wang.nowcoder.util.CookieUtil;
import com.wang.nowcoder.util.HostHolder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;

/**
 * @author wang
 * @ClassName LoginTicketInterceptor
 * @Description TODO
 * @date 2021/12/20 19:21
 * @Version 1.0
 */
@Component
public class LoginTicketInterceptor implements HandlerInterceptor {

    @Autowired
    private UserService userService;

    @Autowired
    private HostHolder hostHolder;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //从cookie中获取凭证
        String ticket = CookieUtil.getValue(request,"ticket");
        if (ticket!=null){
            //查询凭证
            LoginTicket loginTicket = userService.findLoginTicket(ticket);
            //判断凭证是否有效
            if (loginTicket!=null && loginTicket.getStatus() == 0 && loginTicket.getExpired().after(new Date())){
                //根据凭证查询用户
                User user = userService.selectById(loginTicket.getUserId());
                //在本次请求中持有用户
                hostHolder.setUsers(user);
            }
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        User user = hostHolder.getUser();
        if (user!=null && modelAndView!=null){
            modelAndView.addObject("loginUser",user);
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        hostHolder.clear();
    }
}
